Aluminum Coolant Overflow Expansion Tank for Ford Expedition (2018-2024) 3.5L

Heavy-Duty Aluminum Coolant Overflow Expansion Tank for 2018-2024 Ford Expedition (U553)

What it Does: The aluminum coolant overflow expansion tank replaces the crack-prone factory plastic degas bottle on the 2018-2024 Ford Expedition to eliminate pressurized coolant leaks and safeguard engine operating temperatures.

The Stock Ford Expedition Degas Tank Vulnerability

The factory blow-molded plastic expansion reservoir on the U553 platform deteriorates rapidly due to constant thermal cycling from the twin-turbocharged 3.5L EcoBoost engine. Operating under sustained cooling system pressures between 16 and 21 PSI, the OEM nylon composite tank suffers micro-fracturing along the molded ultrasonic center seam and inlet/outlet hose barbs. Over time, engine bay heat soak degrades the plastic resin, turning it brittle, cloudy, and prone to sudden hairline fractures that bleed off pressure, drop coolant levels, and risk overheating when towing or working under load.

The Engineering Solution

Fabricated from high-grade, corrosion-resistant aluminum plate, this replacement degas tank completely eliminates plastic fatigue. Fully TIG-welded seams provide superior structural rigidity capable of withstanding extreme pressure spikes and intense engine bay temperatures without swelling, weeping, or splitting. Designed as a direct bolt-in replacement for OEM part number FL3Z-8A080-A, it incorporates precision-matched mounting brackets and hose connections that mate directly to factory coolant routing without cutting or drilling. The brushed aluminum finish withstands chemical exposure and maintains a clean, durable engine bay appearance.

Technical Specifications

Compatibility

• 2018-2024 Ford Expedition 3.5L EcoBoost V6
• 2018-2024 Ford Expedition MAX 3.5L EcoBoost V6

Frequently Asked Questions

Does this fit the U553 Expedition?

Yes, this is a direct fit for the 2018-2024 Ford Expedition equipped with the 3.5L EcoBoost engine.

Does this aluminum expansion tank require aftermarket hoses or brackets?

No, this tank utilizes all factory mounting points, clamps, and OEM coolant routing hoses for a true bolt-on replacement.

The Ford Towing Standard

Full-size platforms like the U553 Expedition generate massive under-hood thermal loads during heavy towing and payload hauling. Upgrading to a structural TIG-welded aluminum cooling reservoir ensures your pressurized cooling circuit remains intact and reliable no matter the ambient or towing conditions.